This procedure covers the removal and replacement of the blower motor control module in the 2024 Rivian EDV 500, which regulates HVAC fan speed and operation.

Warnings

Tools required

Parts

• Blower motor control module × 1 — Use OEM specification
• Push-pin retainers (assorted) × 1 — Replacement for damaged clips
• Dielectric grease × 1 — For electrical connectors

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn off vehicle and remove key fob from cabin
3. Open front hood and disconnect 12V battery negative terminal
4. Wait minimum 2 minutes for vehicle systems to fully power down
5. Ensure HVAC system has been off for at least 15 minutes to allow cooling

Procedure

1. 1

   Remove lower passenger side dash panel
   From the passenger footwell, locate the lower dash trim panel. Remove three push-pin retainers along the bottom edge using the trim removal tool. Pull the panel down and toward the rear of the vehicle to release the upper clips. Disconnect any electrical connectors for footwell lighting if equipped.
2. 2

   Access the blower motor housing
   Behind the lower dash panel, locate the blower motor housing on the passenger side of the HVAC unit. Remove the sound insulation foam covering if present by releasing the velcro strips. The blower motor control module is mounted to the side of the blower motor housing.
3. 3

   Disconnect the control module electrical connector
   Locate the multi-pin electrical connector on the blower motor control module. Press the locking tab and carefully pull the connector straight out from the module. Inspect connector pins for corrosion or damage. Note the connector orientation for reinstallation.
4. 4

   Remove control module mounting fasteners
   Remove the two T20 Torx screws securing the blower motor control module to the blower motor housing. Support the module with one hand while removing the second screw to prevent it from falling.
5. 5

   Extract the control module
   Carefully slide the blower motor control module out of its mounting bracket. There may be a thermal interface pad between the module and housing; note its position for reinstallation. If the module is stuck, gently rock it side to side while pulling to break the thermal pad seal.
6. 6

   Inspect mounting location and thermal interface
   Clean the mounting surface on the blower motor housing with a lint-free cloth. Inspect the thermal interface pad; if damaged, torn, or hardened, it must be replaced. Check the mounting bracket for cracks or damage.
7. 7

   Prepare new control module
   Remove the new blower motor control module from packaging. Verify the part number matches the original unit. If a new thermal interface pad is included, remove the protective film from both sides. Apply dielectric grease sparingly to the electrical connector pins on the module side.
8. 8

   Install new control module
   Position the thermal interface pad on the blower motor housing mounting surface if replacing. Align the new control module with the mounting bracket and slide it into position, ensuring the thermal pad makes full contact. Hand-start both T20 Torx mounting screws.
9. 9

   Secure control module
   Tighten both T20 Torx mounting screws in an alternating pattern to ensure even seating. Tighten securely but do not overtighten as the housing may be plastic. Verify the module is seated flush against the housing.
10. 10

    Reconnect electrical connector
    Align the electrical connector with the control module socket, ensuring correct orientation. Push the connector straight in until the locking tab clicks into place. Gently tug on the connector to verify it is fully seated and locked.
11. 11

    Reinstall sound insulation and dash panel
    Replace the sound insulation foam over the blower motor housing if removed, securing velcro strips. Reconnect any footwell lighting connectors. Align the lower dash panel with the upper clips and push into place, then secure the lower push-pin retainers.
12. 12

    Reconnect 12V battery
    Return to the front hood and reconnect the 12V battery negative terminal. Ensure the connection is tight and secure.

Reassembly

1. Ensure all electrical connectors are fully seated and locked
2. Verify all trim panels and fasteners are properly secured
3. Confirm no tools or parts are left in the passenger footwell area

Verification

• Turn vehicle to accessory mode and activate the HVAC system
• Test all blower motor speeds from low to high, verifying smooth operation at each setting
• Listen for unusual noises from the blower motor that might indicate poor control module function
• Verify the blower motor responds correctly to temperature adjustments and automatic climate control settings
• Check for any error messages or warnings on the vehicle display related to climate control
• Confirm cabin airflow is appropriate for each fan speed setting
• Test both heating and cooling modes to ensure proper control module operation across all HVAC functions

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